US1379119A - Well-plug - Google Patents

Description

G. W. MAUZEY.

WELL PLUG.

APPLICATION FILED 0m 30, 1920.

Patented May 24, 1921.

JNVENTOR @fiz/ PATENT OFFICE.

GEORGE W. MAUZEY, 0F NEAR EDG-ERTON, MISSOURI.

WELL-PLUG.

emme.

Specification of Letters Patent.

Patented May 24, 1921.

Application filed October 30, 1920. Serial No. 420,748.

To all whom it may concern:

Be it known that I, GEORGE W. MAUZEY, citizen of the United States, residing near Edgerton, in the county of Platte, and State of Missouri, have invented certain new and useful Improvements in Well-Plugs, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to improvements in that class of well plugs which are used for closing the lower ends ofthe linings of gas wells, oil wells and the like, for preventing matter, such as water, sand and the like, from entering the lower ends of said linings, and the objects of my improvements are, first: to provide a simple and efficient plug of this class, which shall be suficiently fragile for permitting its easy and quick removal from the well lining, by application thereto of the well drills now. generally in use, second: to so construct the plug, that when filled with refuse substance, it shall be much heavier than a like bulk of oil or water, thereby preventing the plug from floating, either while it is being placed in a well or being removed therefrom; thus avoiding the inconveniences and much loss of time, now frequently experienced in using and removing the conventional wooden plugs, third: to so construct and arrange the parts of a well plug, that they shall not be damaged by concussion, from striking the bottom of the well, in which said plug is being placed, and when empty, shall be light of weight and cheap in cost of manufacture.

I attain these objects by the devices illustrated in the accompanying drawings, in which:

Fi tically through the center of the plug. Fig. 2 is a top plan of the parts seen in Fig. 1. Fig. 3 is a bottom View of the plug.

Referring to Fig. 1, the body 1, of the plug, isof cylindrical form, is preferably formed of cast iron, and is provided with a plurality of legs 2, which are formed on the outer edge portion of its bottom. The bottom of said body is loaded with stiff mud (not shown,) which is held in place by said legs, which are inclined downward and toward each other for this purpose, and for guiding the body in its decent while being put in place, as hereinafter described.

The bottom of the body is closed by the gure 1 is a longitudinal section, cut ver-' screw threaded plug 3, which is screwed into a screw threaded aperture formed through the bottom of the body 1.

The upper end of said body is similarly closed by the closing plug 4. The bolt apertures 5 are formed through the upper end of said body, through each one of which, a bolt 5 is passed. A plurality of sheets of common cotton fabric 6, such as cement sacks or the like, are superimposed, one upon another, forming a packing for the top of the body 1.

A like plurality of apertures are formed through said packing, which agertures are passed over said bolts 5, after which, the washers 7 are placed on said bolts, respectively and their respective nuts 8 are screwed onto said bolts, for compressing said pack-' ing onto the top of the body 1, and for holding the former in place.

Said body is formed slightly smaller in diagneter than the lining 9, in which it is use In the installation of my invention, the described nuts, washers and packing are removed from the top of said body 1 of the plug, after which the screw threaded closing plug 4: is removed from the position shown.

Said body is thereafter inverted for the removal therefrom of such ones of the bolts 5 as may have gravitated from the. position shown in Fig. 1, ,into said body, after which the latter is reverted. It is then almost filled with a weighting substance, such as stiff mud, or the like, rammed through the thus opened top ofsaid body. The bolts 5 are then passed through said open top, into said body and are placed in their respective bolt holes, after which they are temporarily held in place, by the insertion into body 1 of more of said weighting substance (which is not shown,) until filled.

The closing plug 4, the fabric 7 the washers 7 and the nuts 8 are thereafter placed in the position shown in Fig. 1.

The thus weighted body 1 is much heavier than a like bulk of water or oil, and therefore will not float in liquids of this kind.

The thus prepared plug is placed in the upper end of the lining 9 of a well and is released; after which it gravitates therefrom onto the bottom 10 of the well, by which its further gravitation is stopped.

The previously described mud, which is between the legs 2, acts as a cushion, which prevents the described plug from being broken by concussion, when thus stopped.

After the bottom of the lining 9 is thus plugged, a quantity of cement (not shown,) is mixed and poured into the top of said lining, which cement gravitates therefrom onto the described fabric 6.

Said cement and the hereinbefore described well plug are broken into small pieces by the application thereto of such drill as is generally in use, for removal of said pieces from the lining 9; by the use of any well known devices, which are employed for such purposes. C

Having fully described my invention,

packing is held in place.

In testimony whereof I afiix xfiy s1 ature.

An zEY.

GEORGE W.

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